:root {
  --bg: #070a12;
  --bg-soft: #0c1220;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --text: #e8eefb;
  --muted: #93a1b8;
  --accent: #38bdf8;
  --accent-2: #7c8cff;
  --warn: #fbbf24;
  --radius: 16px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(720px 380px at 50% -8%, rgba(56, 189, 248, 0.16), transparent 70%),
    radial-gradient(560px 320px at 88% 12%, rgba(124, 140, 255, 0.12), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(7, 10, 18, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .04em; font-size: 17px; }
.logo {
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #061019; font-weight: 800; font-size: 16px;
}
.brand .domain { color: var(--muted); font-weight: 500; font-size: 13px; letter-spacing: 0; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: 14px; color: var(--muted); }
.nav-links a:hover { color: var(--text); }
.btn-small {
  padding: 7px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; color: #061019 !important;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.btn-small:hover { filter: brightness(1.08); color: #061019; }

/* ---------- 首屏 ---------- */
.hero { padding: 96px 0 72px; text-align: center; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; font-size: 13px; color: var(--muted);
  background: var(--panel); border: 1px solid var(--border);
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: #34d399; box-shadow: 0 0 10px #34d399; }

.hero h1 {
  margin: 26px 0 12px;
  font-size: clamp(46px, 9vw, 88px);
  letter-spacing: .08em; font-weight: 800; line-height: 1.05;
  background: linear-gradient(120deg, #ffffff 15%, var(--accent) 55%, var(--accent-2) 95%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .sub { margin: 0 auto; max-width: 560px; color: var(--muted); font-size: 17px; }

.cta { margin-top: 44px; display: flex; flex-direction: column; align-items: center; gap: 14px; }

/* 风险提示小字（下载按钮正上方） */
.risk-note {
  margin: 0; font-size: 12.5px; color: #b9a06a;
  background: rgba(251, 191, 36, 0.08);
  border: 1px dashed rgba(251, 191, 36, 0.35);
  padding: 6px 14px; border-radius: 999px;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 17px 46px; border-radius: 999px;
  font-size: 18px; font-weight: 700; color: #05121c;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 12px 40px rgba(56, 189, 248, 0.28);
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
  animation: pulse 3.4s ease-in-out infinite;
}
.btn-primary:hover { transform: translateY(-2px); filter: brightness(1.07); box-shadow: 0 18px 50px rgba(56, 189, 248, 0.38); }
.btn-primary .ver { font-size: 14px; font-weight: 600; opacity: .78; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 12px 40px rgba(56, 189, 248, 0.24); }
  50%      { box-shadow: 0 12px 52px rgba(56, 189, 248, 0.42); }
}

.cta-meta { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; justify-content: center; color: var(--muted); font-size: 13px; }
.sep { opacity: .35; }
.btn-ghost {
  display: inline-block;
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  padding: 5px 13px; border-radius: 999px; font-size: 12.5px; cursor: pointer; font-family: inherit;
}
.btn-ghost:hover { color: var(--text); border-color: rgba(255,255,255,.24); }

/* ---------- 区块 ---------- */
section.block { padding: 68px 0; border-top: 1px solid var(--border); }
.block-title { font-size: 26px; margin: 0 0 8px; font-weight: 700; letter-spacing: .01em; }
.block-desc { margin: 0 0 32px; color: var(--muted); font-size: 15px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.card:hover { transform: translateY(-3px); border-color: rgba(56,189,248,.32); background: var(--panel-strong); }
.card .ico {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; margin-bottom: 14px;
  background: rgba(56, 189, 248, 0.12); color: var(--accent);
}
.card h3 { margin: 0 0 8px; font-size: 16.5px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---------- 更新日志 ---------- */
.log { border-left: 2px solid var(--border); margin-left: 8px; }
.log-item { position: relative; padding: 0 0 30px 26px; }
.log-item::before {
  content: ""; position: absolute; left: -7px; top: 8px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.14);
}
.log-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.log-ver { font-size: 17px; font-weight: 700; }
.log-date { color: var(--muted); font-size: 13px; }
.log-tag { font-size: 11.5px; padding: 2px 9px; border-radius: 999px; background: rgba(52, 211, 153, .13); color: #6ee7b7; border: 1px solid rgba(52,211,153,.25); }
.log-item ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 14.5px; }
.log-item li { margin-bottom: 4px; }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary {
  cursor: pointer; padding: 17px 4px; font-size: 15.5px; font-weight: 600; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--muted); font-size: 20px; line-height: 1; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin: 0 0 18px; color: var(--muted); font-size: 14.5px; padding-right: 30px; }

/* ---------- 页脚 ---------- */
footer { border-top: 1px solid var(--border); padding: 40px 0 56px; color: var(--muted); font-size: 13.5px; }
.footer-disclaimer {
  background: rgba(251, 191, 36, 0.06); border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: 12px; padding: 16px 18px; color: #cbb489; margin-bottom: 22px;
}
.footer-row { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translate(-50%, 20px);
  background: #111a2b; border: 1px solid var(--border); color: var(--text);
  padding: 11px 22px; border-radius: 999px; font-size: 14px; opacity: 0; pointer-events: none;
  transition: opacity .25s ease, transform .25s ease; z-index: 60;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 640px) {
  .nav-links { gap: 16px; font-size: 13px; }
  .nav-links a:not(.btn-small) { display: none; }
  .hero { padding: 64px 0 48px; }
  .btn-primary { padding: 15px 34px; font-size: 16.5px; }
}